CMMG AR-15 A2 Compensator Kit — 1/2x28 | 5.56 NATO/.223 Rem | Includes Crush Washer | SKU 55DA535 | UPC 815835018263

Classic muzzle control made easy. The CMMG AR-15 A2 Compensator Kit (1/2x28) delivers the time-tested A2 birdcage design for 5.56 NATO / .223 Rem rifles, complete with an install-ready crush washer for proper timing and alignment. Whether you’re refreshing a carbine, completing a new build, or returning to proven duty-grade parts, this A2 compensator offers reliable recoil management, flash mitigation, and a rugged finish that stands up to hard use.

Thread Pitch: 1/2x28 (AR-15 standard)
Caliber: 5.56 NATO / .223 Rem
Kit Includes: A2 compensator + crush washer
Model/SKU: 55DA535
UPC: 815835018263
Platform: AR-15 / M4 (1/2x28 threaded barrels)

Why choose the CMMG A2 Compensator Kit?

• Proven A2 geometry
  The familiar birdcage porting helps tame muzzle rise and reduce visible signature compared to a bare muzzle—without the blast and concussion of aggressive brakes.

• Turn-key installation
  Comes with a crush washer so you can time the ports correctly in minutes—no extra parts hunting.

• Duty-ready durability
  CMMG machines the compensator for dependable thread engagement and long service life, then applies a hardwearing finish for corrosion resistance in rain, sweat, and range grime.

• Non-directional look with top timing
  Standard A2 orientation vents gas optimally when timed with the included washer; the closed bottom also helps minimize dust signature when shooting prone.

• Budget-friendly performance
  Light, compact, and effective—an easy upgrade over a thread protector and a trusted option for general-purpose AR carbines.

Ideal use cases

• General-purpose carbines: Balanced control and low concussion for classes, range days, and training.

• Home & ranch rifles: Reliable, low-maintenance muzzle device that won’t punish shooters or bystanders with excessive blast.

• Build refresh or OEM replacement: Keep your rifle compliant with common configurations and accessories.

• Field & patrol style setups: Classic A2 profile mates cleanly with most A2 front sight bases and standard handguards.

What’s in the box

• CMMG A2 Compensator (1/2x28, 5.56)

• Crush Washer (for timing/alignment)

Installation (quick guide)

1. Unload & clear the firearm.

2. Remove existing muzzle device and any old washer/shims.

3. Slide on the crush washer (beveled side toward the muzzle device).

4. Thread the compensator on by hand until snug.

5. Time the device so the closed ports are at the 6 o’clock and the open slots at 12 o’clock.

6. Tighten 1/4 turn at a time until timed—do not over-torque.

7. Function-check and verify clearance with your rail/handguard before live fire.

For suppressor use or specialty setups, follow the suppressor manufacturer’s mounting guidance and do not use a crush washer unless specified.

Key features at a glance

• Thread: 1/2x28 (AR-15 standard)

• Caliber: 5.56 NATO / .223 Rem

• Type: A2 compensator / flash suppressor style

• Included: Crush washer for correct timing

• Finish: Durable, corrosion-resistant

• Weight/Size: Compact, lightweight profile (carbine-friendly)

• SKU/UPC: 55DA535 / 815835018263

Compatibility notes

• Fits AR-15 barrels with 1/2x28 muzzle threads.

• Works with most standard .750 FSB and low-profile gas blocks; check handguard clearance.

• Not intended for .30 cal or other thread pitches (e.g., 5/8x24). Verify your barrel thread.

Frequently asked questions

Q: Will this reduce recoil like a dedicated brake?
A: The A2 offers moderate muzzle rise control and some flash reduction. For maximum recoil reduction, a multi-port brake works better—at the cost of extra blast.

Q: Do I need shims?
A: The kit includes a crush washer, which is typically all you need. Shims are optional if you prefer finer timing adjustments.

Q: Can I pin/weld this to reach 16"?
A: The A2 is often used for P/W builds, but verify length and local compliance. Many builders choose extended devices specifically designed for pin/weld.

Q: Is it compatible with suppressors?
A: This is a standard A2 compensator, not a suppressor mount. If you plan to run a can, choose a suppressor-compatible muzzle device per the can manufacturer.

Best practices & tips

• Use proper tools: An armorer’s wrench and a reaction rod or upper receiver vise block protect your receiver.

• Recheck torque/timing after first range session; heat cycles can settle the washer slightly.

• Avoid threadlocker unless manufacturer specifies; heat can break down many compounds.

• Keep ports clean: A quick brush removes carbon that can accumulate in the slots.

Technical specs (summary)

• Device type: A2 compensator/flash suppressor

• Thread pitch: 1/2x28

• Caliber: 5.56 NATO / .223 Rem

• Material/finish: Steel, corrosion-resistant finish

• Included hardware: Crush washer

• SKU: 55DA535

• UPC: 815835018263

SEO highlights (naturally woven)

CMMG AR-15 A2 compensator kit, 1/2x28 muzzle device for 5.56/.223, includes crush washer, classic birdcage compensator/flash hider, easy installation, durable finish, SKU 55DA535, UPC 815835018263.

Meta for your product page

Meta Title: CMMG AR-15 A2 Compensator Kit — 1/2x28, 5.56/.223, Includes Crush Washer | 55DA535
Meta Description: Install-ready A2 compensator kit for AR-15 rifles. 1/2x28 threads, 5.56/.223, classic birdcage design with crush washer for proper timing. SKU 55DA535 — UPC 815835018263.

From build bench to back-40 range, the CMMG AR-15 A2 Compensator Kit gives your carbine the proven control, clean timing, and durable finish that AR shooters have trusted for decades.

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